The discussion explores the concept of what lies beyond the universe and its expansion, emphasizing that there is no definitive "end" to the universe. Participants suggest that if one could reach the edge of the observable universe, they would still see similar cosmic structures, as it would be a new sphere of observable space. The idea of multiple dimensions and "bubbles" of galaxies is introduced, indicating that these bubbles represent different levels of the universe. Additionally, it is noted that the "other side" of the universe is essentially the past, as we are always surrounded by it and cannot perceive the future. Overall, the conversation highlights the complexities of understanding the universe's boundaries and dimensions.